Also daubed on a wall were the words “Nazi Zone”, while one poster read: “Paki rape gangs coming to your town soon.”
Alex Cutler, another Cardiff resident, tweeted posters found nearby, urging passers-by to “own” the swastika as “the symbol of our struggle”.
Stephen Doughty, the Labour MP for Cardiff South and Penarth, said: “Utterly sick + disgusting - will be raising with @swpolice @swpcardiff @cardiffcouncil immediately - far right extremism cannot be tolerated and not welcome in Cardiff. Full stop."
Mr Pycroft described Grangetown as a “very diverse area” with an immigrant community and ties going back to the city’s past as a coal port.
He told the JC: “My family have worked in this area for a few generations, and I've lived here for the past decade. The far right hasn't featured, but an anti-racist march is due to set off from the park, Grange Gardens, tomorrow, so it's likely the graffiti is linked to that.
“I know what those symbols, and the people who push them, represent. They disgust me and I had to ensure it was reported.
“It was unfortunate that local kids were exposed to it too, on one of the walls was opposite the main school bus stop, which is why I'm thankful that the local council is removing the graffiti before the schools finish for the day.”